<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>playRateSign</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div>
      <button id="start">开始执行</button>
      <button id="end">结束执行</button>
    </div>

    <script src="./popup.js"></script>
  </body>
</html>
